On Wed, Oct 21, 2015 at 7:48 AM, Gregory Maxwell <gmaxw...@gmail.com> wrote: > I'm still sad that uniform segregated witeness is so hard to deploy, > adding another id to every utxo set won't be a nice cost. :( But I > have been trying for a long time to come up with anything better and > not being successful.
Oh good. Luke solved it. To deploy SW without a disruptive flag day this encoding could be used: A new P2SH like scriptPubkey type is defined. In the soft-fork, the scriptsig for this scriptPubkey is required to be empty. Signatures are not covered under txid, but carried along side. Then committed to in blocks in a separate hashtree. The only disadvantage to the approach used in elements alpha that I can come up with so far (in the few minutes since luke turned my can't into a can) is that that the approach in EA did not disrupt the normal relay handling process, and this would, since relay that transports the extradata either needs to use a different hash that includes the witness, or have a separate mechanism for witness transport. _______________________________________________ bitcoin-dev mailing list bitcoin-dev@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev